The way it works is to put a parameter value in the shortcut key, with a space character in between the 'Align' command name and the parameter. The parameters for the Align command can be one of: HorizontalCenter, HorizontalTop, HorizontalBottom, VerticalCenter, VerticalLeft, VerticalRight .

Hi Stien, you're welcome! Yeah it would definitely be a good idea to have this mentioned in the help topic for Align.

But yes you found how to look it up yourself, basically all the workflow, options and UI handling for every command works through those script files. One interesting thing about that is that you can change a lot of how MoI works and looks by editing those files.